Sonic LAB: MakeNoise XPO - MATTHS and Nick Go Twos Up

US Stereo Prismatic Oscillator      17/10/22

Buying Choices
Affilliate Links help support the site

The MakeNoise XPO is a stereo prismatic oscillator for Eurorack, which gives us 5 discrete outputs from the oscillator core plus three stereo pairs from timbral modulators. It's unusual to see so much tonal variation from a single oscillator all available simultaneously.

 The five discrete mono waveforms:
Sine, Triangle, Sawtooth, Spike and Sub Oscillator, these are all locked to the same pitch (apart from the Sub which is 1 octave down.

The three stereo outputs are:

  • Wavefolder
  • Vari-Timbre 
  • And PWM - yay, stereo PWM!


These three distinct timbral engines offer a significant range of sounds. Each side has a modulation input on attenuvertor, plus CV input on attenuverter control. LEFT CV is normalled to the right so you can modulate from a single source if you like

There's also an FM input (Exponential and Linear) normalled from the Sub oscillator output.

In practice, this oscillator allows for a lot of tone and modulation, it's possible to create some extremely complex modulation setups, and all of the tones are in tune.

There is also a second V/Oct input which is added to the main V/Oct - we were hopefull that it might mean independent control of L/R pitch but it's not...

The core Oscillator waves sound great, with the Sub Osc not just your average Square wave, it has a much richer harmonic  - it's a mix of multiple Square waves derived from the oscillator core at lower octaves (sub-harmonics), 

For the Stereo outputs,  the Left CV input is normalled to the R CV so you can modulate this from the same source by different amounts and with positive or negative offsets.

Wave Folder - really nice rich tones, with an adjustable centre point which: "modulates the shape and fold point of the wave sent through the wavefolder, with the simplest saturated sinusoid wave appearing at full CCW and a thin crispy series of Spikes occurring Full CW."

Vari-Timbre - is a lovely morphing tone  in this case the center control: "cross-fades both left and right Vari-Timbre signals from Sine to Sawtooth, a function found in classic WEST COAST synthesizer circuits such as the Buchla 158 and 258."

Pulse-Width - I think this must have been built for Nick as it's able to deliver some wonderful wide independent L/R PWM  - the center CV does not affect this output.

FM inputs, both Linear (normalled from Sub) and Exponential input are provided with the latter on another attenuvertor.

The XPO is a great sounding and versatile oscillator, true it's rather premium at around £429/$399 but it is capable of a lot of tone from a single unit. As Matths mentioned in the review, can drive a large element of a live rig without any tuning issues.

True, you're going to need a stereo path and/or more VCAs but that's the nature of modular innit?

Available now.


Makenoise Social

< More From: MAKENOISE
Even more news...


Get Our Newsletter


5 Minutes With: The Waldorf M Wavetable Synthesizer 

Classic Waldorf Wavetable sounds and some

Inside Superbooth 2024 

Behind The Scenes with Sonicstate

The 1991 Videogame inspired by rave culture. 

Hex (feat. Coldcut) wrote the trippiest sounding game!

SUPERBOOTH 2024: The Awards 

And the award goes to...

SonicLAB: Emergence Audio Infinite Upright Patch Flip 

Piano based Kontakt library sound exploration

With Divkid, Gaz and Richard Nicol